drbd + mysql 高可用集群

dfsfd

  在上两篇中，我分别写到了 drbd 和 corosync、pacemaker、crm 的配置和使用，在本节中，我讲这两种东西结合起来，做出 drbd + mysql 高可用集群。
一、实验环境

系统版本：centos7
实验机器：
    node1：192.168.163.172
    node2：192.168.163.173
软件源：阿里云


二、实验过程

drbd 的配置和 corosync 的配置就不再说明，直接开始
首先增加drbd资源

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crm(live)#configure crm(live)configure#primitive mysqldrbd ocf:linbit:drbd params drbd_resource=mysql op start   timeout=240 op stop timeout=100 op monitor role=Master interval=20 timeout=30 op monitor role=Slave interval=30 timeout=30 crm(live)configure#ms ms_mysqldrbd mysqldrbd meta master-max=1 master-node-max=1 clone-max=2clone-node-max=1 notify=true crm(live)configure#verify crm(live)configure#show crm(live)configure# show node 1: node1 node 2: node2 primitive mysqldrbd ocf:linbit:drbd \ params drbd_resource=mysql \ op start timeout=240 interval=0 \ op stop timeout=100 interval=0 \ op monitor role=Master interval=20 timeout=30 \ op monitor role=Slave interval=30 timeout=30 ms ms_mysqldrbd mysqldrbd \ meta master-max=1 master-node-max=1 clone-max=2 clone-node-max=1 notify=true property cib-bootstrap-options: \ have-watchdog=false \ dc-version=1.1.16-12.el7_4.4-94ff4df \ cluster-infrastructure=corosync \ cluster-name=mycluster \ stonith-enabled=false

增加文件系统资源

1	crm(live)configure#  primitive mystore ocf:heartbeat:Filesystem params device=/dev/drbd1 directory=/data fstype=xfs op start timeout=60 op stop timeout=60

给文件系统类型和drbd做亲缘性绑定

1	crm(live)configure# colocation mystore_with_ms_mysqldrbd inf: mystore ms_mysqldrbd:Master

做顺序约束，当drbd起来之后才对文件系统进行绑定

1	crm(live)configure# order mystore_after_ms_mysqldrbd mandatory: ms_mysqldrbd:promote mystore:start

接下来增加一下mysql资源,并作亲缘性绑定

1 2	crm(live)configure#primitive mysqld systemd:mariadb crm(live)configure# colocation mysqld_with_mystoreinf: mysqld mystore

作顺序约束，先挂载文件系统，然后在启动msyqld资源

1	crm(live)configure#order mysqld_after_mystore mandatory: mystore mysqld

增加VIP资源，作虚拟IP调度

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crm(live)#configure crm(live)configure#primitive myvip ocf:heartbeat:IPaddr params ip="192.168.113.120" opmonitor interval=20 timeout=20 on-fail=restart crm(live)configure#  colocation vip_with_ms_mysqldrbd inf:ms_mysqldrbd:Master myvip

检查并提交

1 2	crm(live)configure#verify crm(live)configure#commit

查看状态

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crm(live)# status Stack: corosync Current DC: node1 (version 1.1.16-12.el7_4.4-94ff4df) - partition with quorum Last updated: Wed Oct 25 08:38:22 2017 Last change: Wed Oct 25 08:38:14 2017 by root via crm_attribute on node2 2 nodes configured 5 resources configured Online: [ node1 node2 ] Full list of resources: Master/Slave Set: ms_mysqldrbd [mysqldrbd]      Masters: [ node1 ]      Slaves: [ node2 ] mystore(ocf::heartbeat:Filesystem):Started node1 mysqld(systemd:mariadb):Started node1 myvip(ocf::heartbeat:IPaddr):Started node1

三、测试

先访问数据库，并新建一个用户，供远程访问使用

1 2	MariaDB[(none)]> GRANT ALL ON *.* TO 'root'@'%' IDENTIFIED BY '123456';             QueryOK, 0 rows affected (0.00 sec)

使用VIP访问数据库

[iyunv@node1 ~]# mysql -uroot -p123456 -h 192.168.163.100

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Welcome to the MariaDB monitor.  Commands end with ; or \g. Your MariaDB connection id is 4 Server version: 5.5.56-MariaDB MariaDB Server Copyright (c) 2000, 2017, Oracle, MariaDB Corporation Ab and others. Type 'help;' or '\h' for help. Type '\c' to clear the current input statement. MariaDB [(none)]> show databases; +---------------------+ | Database            | +---------------------+ | information_schema  | | #mysql50#lost+found | | mysql               | | mysqld              | | performance_schema  | | xhk                 | | xhk777              | +---------------------+ 7 rows in set (0.06 sec)

接下来，将node停掉，服务自行转到node2

1	crm(live)# node standby

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crm(live)# status Stack: corosync Current DC: node1 (version 1.1.16-12.el7_4.4-94ff4df) - partition with quorum Last updated: Wed Oct 25 08:43:46 2017 Last change: Wed Oct 25 08:43:41 2017 by root via crm_attribute on node1 2 nodes configured 5 resources configured Node node1: standby Online: [ node2 ] Full list of resources: Master/Slave Set: ms_mysqldrbd [mysqldrbd]      Slaves: [ node2 ]      Stopped: [ node1 ] mystore   (ocf::heartbeat:Filesystem):    Stopped mysqld    (systemd:mariadb):  Stopped

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crm(live)# status Stack: corosync Current DC: node1 (version 1.1.16-12.el7_4.4-94ff4df) - partition with quorum Last updated: Wed Oct 25 08:43:46 2017 Last change: Wed Oct 25 08:43:41 2017 by root via crm_attribute on node1 2 nodes configured 5 resources configured Node node1: standby Online: [ node2 ] Full list of resources: Master/Slave Set: ms_mysqldrbd [mysqldrbd]      Slaves: [ node2 ]      Stopped: [ node1 ] mystore(ocf::heartbeat:Filesystem):Stopped mysqld(systemd:mariadb):Stopped myvip(ocf::heartbeat:IPaddr):Started node2

继续使用VIP访问数据库

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[iyunv@node1 ~]# mysql -uroot -p123456 -h 192.168.163.100 Welcome to the MariaDB monitor.  Commands end with ; or \g. Your MariaDB connection id is 2 Server version: 5.5.56-MariaDB MariaDB Server Copyright (c) 2000, 2017, Oracle, MariaDB Corporation Ab and others. Type 'help;' or '\h' for help. Type '\c' to clear the current input statement. MariaDB [(none)]> show databases; +---------------------+ | Database            | +---------------------+ | information_schema  | | #mysql50#lost+found | | mysql               | | mysqld              | | performance_schema  | | xhk                 | | xhk777              | +---------------------+ 7 rows in set (0.06 sec)